Valve for air pumps and means for actuating same



Nov. 27,1923; -1,4' 75,826 L. F. HOFFMAN VALVE FOR AIR PUMPS AND MEANSFOR ACTUATING SAME Filed Dec. 5. 1922 2 Sheets-Sheet'l -INVENTOR.

v TTY.

Nov. 27, 1923. 1 475326 L. F. HOFFMAN VALVE FOIR AIR PUMPS AND MEANS FOR ACTUATING SAME Filed Dec. 5. 1922- I 2 SheetSFSheet 2 1 N V EN T OR.

ATTORNEY.

Patented Nov. 2 7, 1923.

UNITED "STAT S 4 I 1,475,826 PATENT OFFICE.

Iinon .1. HOFFMAN, or minim PENNSYLVANIA, ASSIGNOR 'ro cmoaeo PNEU- e Mano r001. 09., on NEW YORK, n. Y., A CORPORATION-F NEW, JERSEY.

FOB AIR- PUMPS AND MEANS FOR ACTUATING SAME.

Application filed December 5, 1922. Serial Noi 605,061.

To all whom it may concern:

.Beit known that. I, 'LEoN' F. HOFFMAN, citizen of the United States, residing at Franklin, in the county of Venango and 5. State of Pennsylvania, have invented certain new and useful Improvements in Valves for Air Pumps and Means for Actuating Same,

of which the following is a specification.

This invention relates to a valve organiza- -tion for air pumps and compressors, and

morpcspecially to such a valve organization'that is adapted to be both automatidaily and manually upseatable or removable fromthe port with which it is associated 1 in the wall of such pump or compressor.

The objects, and construct-ion of my imroved valve organization areiherein set orth 'With sufiieient clearness, to enable 'I others skilled in the arts 'to which its con- '20- struction-and use respectively relate to make and-use the same. This invention has for its primaryobjectthe provision of 'a discharge valve organij zation for air pum s and compressors, which is adapted to e automatically un- Seated-or removed from the port with which -.it cooperates in the cylinder wall of the so that any non-compressible flui-rl whic may be drawn into said cylinder may -30. -be discharged through said port instead of V through'the valve organization, as in the normal operation of the pump.

Another object ofj t his invention is, to

provide a 'valve or anizationwhich may be 3.5 manually unseatetf or removed from the a port wit which it is associated, for the purpose of unloading the pump.

Still another object. of this invention is,

I to provide a discharge val-ve organization 40 forvacuum pumps which may be manually unseated from its port "in the wall of the cylinder before'the pump is started, thus permitting the pump, immediately upon starting to run idle, and thereafter, by a v-15 certain manipulation of said valve organization to cause the pump to gradually assume its full load. i

The application and utilization ofmy improved valve organization for the accomplishment of this latter object is fully set forth in an application for Letters Patent of the United States filed by me on the 19th day of January, 1921, Serial Number 438, 367, for vacuum pumps and method of operat ng same.

One form of construction. whereby I am enabled to" secure said objects is clearly 1llustrated in the accompanying drawings in.

which cylinder wall with which it .is associated,

as whenin normal operation,

Fig. 2 is a View partly in longitudinal section and partly in side elevation showing said valve organization unseated or removed from the port with which it is associated, as when the pump is manually unloaded also when anon'eompressible fluid is being discharged through the cylinder port, instead of through the organization.

The valve illustrated in said drawings is of the so-called plate type and comprises the following elements:

A' circular base 1, which is, sometimes thereof one or more concentric annulartermed the valve seat, having as features ports 2, 2, which extend through said base,

with which are associated. annular plate valves 3, 3 respectively; said valves are composed of sheetsteel, .or at least, a thin annulus of steel formed in any suitable man- 'ner; they are cooperatively associated to theirrespective ports in such manner as to control the direction of flow of air through the port with which the organization is as sociated, in this case the discharge of air from the cylinder.

Said plate valves 3, 3" are yieldably re- I tained in, their operative relation to their respective port-s by means of the volute springs at. Said springs 4 are carried within suitable sockets which are provided in an element 5 termed the valve keeper.

About the periphery of said base 1 is formed an annular flange or lip 6, the lower edge of which is adapted to seat upon the wall seat 7 formed about the outer side ofciated with said stud serves to secure said i elements 1 and 5 rigidly together. Said pended claims to here indicate that the conception of the cylinder wall 9, is what is' struction thus far described, with the excontemplated by the term valve organiza-. tion. f

In orderto attain the desired functions of said valve organization, it is-necessary that it be yieldablyretained upon the wall seat 7, that is, in-its cooperative relation to said port- 8 ,so that it may. be manually removed from said cooperative relation, as.

in the unloadingof thepump or3compressor,;and also automatically actuated outoi saldcooperative relation, asiztthe ex- 'pulsion ofa non-compressiblefiuid'from the cylinder directly througlflport' 8 instead of nil through the base. ports; 2, 2, by way of valves 3, 3' Said functions are attained in the-following manner:

' A lifting stem 14.- is connected to tang 13 by means of what/may be termed a universal joint connection as follows Said stem 14 is provided adjzment its in-- ner end, adjacent to the valve organization,

,whether my inventive idea is applied to a discharge or an inlet valve.

with a socket 15 to loosely receive said tang 13; said tang is provided with a longitudij nally-elongatedslot 16, and a pin 17 which is rigidly carried by the walls of said socket 15 passes through said slot' thus loosely connecting said stem to said tang in such a manner that a limited amount of relative universal movement of said tang and the thereto connected organization is provided for. Said stem 14 passes non-revolubly through a fixed guide, as a cover 18, which serves to close a porttpr hand hole 19 in a casing 20 of the pump or compressor cylinder. Said cover or guide 18' is centrally provided with-a boss 21 through which said stem extends and in which it has longitudinal movement. Said boss is provided with longitudinally-extending slot 22 at one side of and intersecting the guide hole through which said stem passes, said slot being for the purpose of receiving a laterally-extend ing. pin 23 which rigidly associatedwith said-stem, and whereby said stem is nonrevolubly carried by said guide in which it has longitudinahmovement. The outer end of said stem is provided with a screwthread for the reception of 'a hand-wheel 24 which is operable to a ctuatesaid stem longitudinally in one direction. which actu--' ation-is transmitted to said organization to stud projects bemove the same in one direction, in this case, p

pression spring'whichsurrounds said stem,

said spring being indicated by the ordinal 26. The ofiice of said, spring is toeffect the yieldable seating ofsaid valve-organization upon said wall seat 7, the compressive stress of said spring being such that, in the normal operation of the pump or compressor, the lip 6 of base 1 will be maintained in hermetic contact with said seat 7 Under abnormal pressure, however, such as may be-caused by the presence of a non-compressible fluid within the cylinder, said valve organization will be automatically, m0men- "taril unse ted so as to permit the expul- Sionof'such fluid directly'through the port 8'without-undue strain or damage to said organization or any element thereof. In

such autqmatic unseating of the valve or- --'gamzat1on, as well as when theorganization has been manually unseated by means of the hand-wheel 2 1, saidspring serves to restore said organization to its operative relation to said port 8, in this latter case, of

conrse, said hand wheel being actuated to permit such restoration.

It iscontemplated that the respective functions of said spring and said handwheel mayrbe reversed, depending upon Referring now to the matter of providing a certain amount of relative universal move- ,ment between said tang and the thereto connected organization, and said stem 14, such movement is provided for the purpose of assuring that' the valve organization will always befree to seat truly and firmly upon in order that no shearing stress upon the pin 17 will be produced by the compressive action of the spring, thereby assuring that all compressivcnction of said spring will be transmitted by the end of said stem 11. at its hearing point upon the nut 11, or upon the keeper 5 should said nut-.be dispensed with. This universal joint provision eliminates the "necessity of employing difiicult and expensive machine work, which ,would otherwise be required.

Guide lugs 27 are provided upon the port faced the base 1 and arranged, to cooperate with "the wall of the port 8 By a sliding contact therewith and-thus to maintain the valve organization in its proper concentric position and relation to said port; the

formed upon said wall surrounding said.

port, of a valve organization arranged to be actuated into cooperative relation to said port by being seated upon .said seat so as to be yieldably retained in'said relation, also to be both automatically and manually actuated out vof said relation; actuating means for said organization comprising in" combination, a universal joint carried by said organization, a compression springarranged to actuate said organization into said cooperative relation to said port through the medium of said universal joint and to 2 yieldably retain said organization in said relation, a stem connected to said organization through the medium of said universal joint-for the purpose of actuating said organization out of said cooperative relation, and, manually-operable means carried by said stem to eifect the actuation of said organization out of said cooperative relation to said port.

2. The combination with the cylinder of 'an air pump having a valve port formed through the wall thereof and a, valve-seat formed upon said wall surrounding said ort of avalve or anization arran ed to be actuated into cooperative relation to said 40 port by being yieldably seated upon said seat and to be both automatically and manually unseatable therefrom; means for actuating said organization and yieldably re- 7 taining the same in said cooperative relation to said port and for manually actuating said organization out of said relation comprising in combination, a compression spring arranged to actuate said organization into said cooperative relation to said port, a uni versal joint carried by said organization, a

stem connected to said organization through the mediumv of said universal joint for the purpose of actuating said organization out of said cooperative relation, manuall -operablemeans carried by said stem to e ect the actuation of said organization-out of said cooperative relation to said port, and means carried by said organization in association with the wall of said port maintaining said organization in concentric, axial alinement with'said port.

3. The combinationwith the cylinder of van air pump having a valve port formed through the wall thereof and a seat fora valve organization formed upon said wall zation arranged to be actuated into cooperapression spring arranged to actuate said organization into said cooperative relation to 7 said port and to yieldably retain the same in said relation, a universal joint carried by said organization, a stem connected to said organization through the medium of said universal joint, arranged to actuate said organization out of said cooperative relation, manually operable means carried by said stem to effect the actuation thereof, guide lugs carried by said organization in slidable relation to the walls of said cylinder port retaining said organization in concentric axial alinement w th said port, and means preventing the Withdrawal of said lugs from said port.

4. The combination with the cylinder of an air pump having a, valve-port formed through the wall thereof, a valve-seat formed upon said wall surrounding said port, a guide plate carried by said cylinder spaced from said valve-seat and having a 95 guide-hole positioned in concentric axial 1 alinement with said port, of'a valve organization arranged to be actuated into cooperative relation to said port by being seated upon said valve seat and yieldably retained in said relation also both manuallyand automatically actuable out of said relation; actuating means forsaid organization comprising in combination, a compression spring bearing at one of its ends upon said guideplate and at its other end exerting actuating pressure upon said organization so as to actuate same into said cooperative relation and yieldably retain same therein, a stem ext-ending through said guide-plate connected at its inner end to said organization so as to permit a universal movement of said organization relative to said stem, and manually operable means carried bv said stem to effect the actuation of said organization out of its cooperative relation to said port.

5. The combination with the cylinder of an air pump having a valve-port formed through the Wall thereof, a valve-seat, formed upon said wall surrounding said port, a guide-plate carried by said cylinder spaced from said valve-sea t and having a guide-hole positioned in concentric axial alinement with said port, of a valve-organitive relation to said port by being seatedv upon said valve seat and yieldably retained in said relation, also both manually and automatic-filly actuable out of said relation; ac-- tuating means for said organization com- &

prising in combination, a compression spring bearmg at its outer end upon sald guide-plate and at its inner end exerting actuating pressure upon said organization so as to actuate same into said cooperative relation to said port and yieldably retain same therein, a stem extending throu h said guide-plate connected at its inner en to said organization so as to permit a limited,

amount of universal movement 'of said organizatlon relative to said stem, manuallyoperable means'carried' by said stem to effeet the actuation of said organization out of its cooperative relation tosaid port, and means malnta-ining sald organization in its concentric, axial alinement with said port.

6. The combination with the cylinder of an "air pump having a valve-port formed through the wall thereof, a valve-seat formed upon said well surrounding said port, a aide-plate carried by said cylinder spaced rom said valveseat and having a guide-hole positioned in concentric axial alinement with said port, of a valve organizatiton arranged to be actuated into cooperative relation to said port by being seat- .ed upon'said valve-seat andyieldably retaine'd insaid relation, alsoboth automatically and manually actuable'out of said relation; actuating means for said organization comprising in combination, a compression spring bearing at its outer end upon said guide-plateand at its inner end exert- .ing van actuating pressure upon said organizatiton so as to actuate same into said cooperative relation to said port and yield ably retain same-thereat, a stem extending through said guide-hole, connected at its 111-;

ner end to said organization so as to permit a limited-amount of universal movement of.

said organizationrela'tive to said stem, manually-operable meanscarried by stem operable to effect the actuation ofsaid organization out of its cooperative relation to said port, guide-lugs carried by said or anization in slidable contact with the wa ls of saidport to maintain said organization in concentric alinement with said port, and means preventing the actuation of said lugs out of said contact with said port walls.

7. The combination with the cylinder wall of an air pump havinga valve-port formed through the wall thereof, a valveseat formed upon said wall surrounding said .port, a guide-plate carried by said cylinder spaced from said valv'e-seat-and having aguide-hole posititoned in concentric axial alinement with said port, of a discharge valve organization arranged to be actuated into cooperative relation to said part b being seated upon said valve-seat and yiel ablpwined in said relation thereto also bothauto'matically and napually actuable out of said relation, actuating means for sa d. organization compr sing in combina ganization in 'tion, a compression spring hearing at one of'its ends upon said guide-plate and at-its other end'exerting actuating pressure upon said organization so as to actuate same into said cooperative relation to said port and yieldably retain same therein, a stem extending through said guide hole connected at its inner end to said organization 50 as to permit a limited amount of universal movement 1' of said organization relative to said stem, and

manually-operable means carriedby said stem operable to effect the actuation of said" organization out tion to said port. H

8. The. combination with the cylinder of said cooperative, relawall of an air pump having a valve-port ends upon said 'guide-plate and at its other end exerting actuating pressure upon said organ zation so 'as to actuate same nto said cooperative relation to said port and yieldably retain same-therein, a stem extending through said guide-hole connected at its inv ner end to said organization so as to'per'mit a limited amount of universal movement of Y said organization relative to said stem, man- 11ally-operablemeans carried by said stem operable to effect the actuation, of said organizat-ion out-"of cooperative relation to said port, and/means maintaining said orconcentric, axial alinement to saidport.--'- v 9. The combination with the cylinder Wall of an air pump having a valve-port, formed through the wall thereof; a 'valve' seat formed upon saidwall. surrounding said port, a

guide-plate carried by said cylinder spaced rom said seat. andihaving'a guidehole positioned in concentric, axialalinement with said port, of a discharge-valve organization arranged to be actuated into cooperative relation to said port by being seated upon said valve-seat and yieldably retained in said relation thereto also both automatically and manually actuableout of said relation, actuating means for said OI'gILDIZaf/IOIL comprising in comblnation, a compression springhearing at one of its end exerting actuating pressure upon said organization soas to actuate same into said cooperative relation to said port and yieldends upon said guide-plate and at its other by said stem operable to effect the actuation of said organization out of cooperative relation to said port, and guide-lugs carried by said valve-organization in association with the walls of said port maintaining said organization in concentric, axial alinelnent with said port. 2 l5 a 10. The combination. with the cylinder wallof-an air pump having a valve-port formed through the wall thereof, a valve seat formed upon said wall surrounding said port, a guide-plate carried by said cylinder spaced from said seat and having a"guide hole positioned in concentric, axial alinement with said port, of a dischargehole an valve organization arranged to be actuated into'cooperative' relation to said port by being seated upon said valve-seat and yieldably retained in said relation theretdtalso both automaticallyand manually actuable out of said relation, actuating means for said organization comprising in combination, a

i :11 compression springbearing at one of its ends upon said guide-plate and at its other end exerting actuating pressure upon saidorganization so as to. actuate same into said cooperative relation to said port and yieldably retain same therein, a stem extendi-n non-revolubly through said guide: having longitudinal movement therein connected at its inner end to said organization so ,as to permit a limited amount of universal movement of said organization relative to said stem, manuallyoperable means carried by said stem to effect the actuation of said organization out of cooperative relation to said port, guide-lugs carried by said organization in slidable contact with the wall of said port maintaining said organization in axial a'linement with said port, and means preventing the. withdrawal of said lugs from said port.

11. The combination with an air pump cylinder having a valve-port formed through the wall thereof, a seat for a valve organization formed upon said wall surrounding said port, and a guide carried by said cylinder in axial alinement with said port and spaced from said seat; of a valve organization arranged in axial-alinement with said port actuable into cooperative relation to said port, also actuable out of said relation,

said organization comprising a circular, an-

fnularly-ported base having a seating lip formed upon its periphery, annular valveplates cooperatively associated with said annular ports, so as to govern the passage of air therethrough, a valve-keeper rigidly keeper and projecting therefrom to form a tang; said valveorganization being in said cooperative relation to said valve-port when said seating lip is \seated upon said seat; a compression spring hearing at one of its ends upon said guide and at its other end upon said organization whereby said organization is actuated into said cooperative relation, an

actuating stem extending non-revolubly,

l0ngitudinally-movably through said guide, connected at its inner end to said tang so as to permit" a limited amount of universal movement of said organization relativeto said stem, means carried by said stem manually-operable to actuate said organization out of saidcooperative relation, and means maintaining said axial alinement of said organization with said valve-port.

12. Thejcomb'ination with an air pump cylinder having a valve-port formed through the wall thereof, a seat for a valve organization formed upon said wall surrounding said port, and a guide carried by said cylinder having a guide-hole positioned in axial alinement with said port; of a valve organization arranged in axial alinement with said port and actuable into cooperative'relation thereto, also actuable out of said relation; said organization comprising a circular, annularly-ported base having a seating lip formed upon its periphery, annular plate valves cooperatively associated with said annular ports so as to permit the passage of air outwardly theretlirough, a valve-keeper 'ri idl secured to said base maintainin said g y .e

port when said seating lip is seated upon said seat; a compression spring hearing at one of its ends; upon said guide its other end exerting actuating pressure upon saidorganization whereby it is actuated into said cooperative relation to said valve-port, an actuating -stem extending non-revolubly, longitudinally-movably through said guidehole, connected at its inner end to said tang so as to permit'a limited amount-of universal movement of said organization relative to saidstem, means carried by said stem manually operable to actuate said organization out of said cooperative relation to said valve-port,- means maintaining said axial alincment .of said organization with said port, and means limiting the extent of said manual actuation. I

13. The combination with the cylinder of an air pump having a valve-port formed relation. to said annular th'rough tlieavailf'thereof, a seat for a valveorganization :formed upon said wall surrounding said port and a guide carried by said cylinder having a guide-hole' therein in axial alinement with said port and spaced therefrom; of a discharge-valve organization adapted to be actuated into cooperative association with said valve-port comprising in combination, an annularl -ported valve base adapted to .be removab y seated upon said wall seat, guide lugs carried by said base projecting into said valve port so as to maintain said base in axial alineinent with said port, annular plate-valves associated with said annular ports in said base, a valve-keeper rigidly secured to said base maintaining said valves in their operative 'orts, a centrally-, ositioned, axially-extemfing stud extendmg rigidly through said base and said keeper securing them together and projecting therefrom to form a. tang, a compression spring bearing atone of its ends upon said keeper and at its other end upon said guide whereby said valve organization is actuated to and yieldably retained in said'cooperati've relation to said valve-port, anactuating stem extending through and having longitudinal movement in said guide-hole connectedat its inner end to said tang, and manually-operable means carried by said stem to actuate said organization out of said cooperative relation to said valve-port, so as to permit the passage of, air freely through said port in both directions.

14. The combination with the cylinder of an air pump having a valve-port formed through the wallthereof, a seat for a valveorganization. formed upon said wall surxounding said port and a guide carried by said cylinder having a guide-hole therein in axial alinement with said port and spaced therefrom; of a discharge valve organiza tion adapted tobe actuated into cooperative relation to said valve-port and'removed therefrom comprising combination; an annularly-ported valve base adapted to-be -r emovably seated upon said wall seat, guide lugs carried by said base in slidab'le-rela-- tion to the wall of said valve-port maintaining sa id base in axial alinement with said port, annulanplate-valves associated 'rgani ation whereby said organization is,: I

with said annular ports in said base, a valvekeeper rigidly secured to said base maintaining said valves in their cooperative relation to said annular ports respectively, a centrally-positioned, axiallyextending stud extending throughsaid base and'said keeper securing them together and projecting, therefrom to form a tang, a compression spring hearing at its outer end upon said. ide and at its inner end upomsaid @tuated; to and ,yieldably retained in said out of said' cooperative relation to said port, 1

and means positively'limiting the extent of said actuation so as to prevent the withdrawal of-said port. r 15; 'The combination with the cylinder of an air pump having a. valve port formed through the wall thereof, a seat for a valve-.

organization formed upon said wall surrounding said port and a' guide carried by said cylinder spaced from said seat and having a guide-hole positioned in axial alinement with said port, of a valve-organi-- zatio'n adapted to be actuated intocooperative relation to said port so as to insure the passage of air through said organization in one direction only and to" be actuated out of said relation'to said port so as to permit the passage of air from said port freely inboth' directions, said organization comprising in combination; a circular, annularlyported valve-base having a seating -lip formed upon its-periphery, guide lugs carried by said base in slidable relation to the Wall of said valve-port so as to maintain said base in concentric relation thereto, annular plate valves associated with said annular guide-lugs from 'saicl valve-- ports in said base, a valve-keeper rigidly seing them together and projecting therefrom to form a tang said cooperative relation between said valve-port and said valve-organization-being attained when said seating lip is seated upon said wallseat; actuating means for said" valve comprising a centrally positioned compression spring hearing at one of its ends upon said organization and at its other end upon said guide wherelly said organization is actuated to and 'yie ably retained in said cooperative relation,

.meansfor actuating said organization out of .said relation comprising a longitudinally movable through said guide hole, provided upon its outer'end with a screw thread and connected'atvits inner end to said tang, a handwheel. cooperating with said screw-thread and said guide, and means carried by .said' stein limiting the extent of said actuation. In testimony whereof I afiix' my signature in presence of two Witnesses.

v LEON. F, HOFFMAN. Witnesses:

,s P. Cowm 4 I r VIRGINIA J. HOCKMAN.

, stem extending non revolubly- 

